A very clever card effect that requires no skill!
Ask your spectator to name two of the four Jacks- a red suit Jack and a black suit Jack.After he does, you open the card packet on the table.Inside are four blue-backed cards and four red-backed cards.You place both sets of cards on the table, still face down.Now you spread one pile- three of the cards are face down, but one card is face up.It's one of the spectator's chosen cards!You spread the other pile the same way.Again, three cards are face down, and one is face up.It is the spectator's other chosen card!
Now you remove the face-up card from the red pile.It has a BLUE back!And you remove the face-up card from the blue pile.It has a RED back!
As a finale, you turn over all of the face down cards-And they are all blank!Your spectator chose the only cards that were printed!